Boomerang shaped UFO silently flies across sky in Lafayette Colorado.

A boomerang-like shape slowly flew above us in a straight line. It had sort of gray dots, I assume maybe lights along the craft. They were slightly scattered. From where we were, it looked about three times the size of a plane, in a boomerang shape. We had sighted several planes prior to this, none of which going this direction or of that size. I hadn't seen anything quite like it before. It was silent, though there was wind so that could've blocked any possible noise.It seemed to blend in with the sky as well and it was pretty dark out, but we could still make out the boomerang-like shape. I could see a soft glow around the object. I apologise for not being able to put in the time above. But it was around 7:35 PM when we spotted it.